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refactors extract report rates

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JasterV 2021-12-07 20:34:37 +01:00
parent 429866fdaf
commit 8793bbbb00
1 changed files with 9 additions and 10 deletions
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19
day3/src/main.rs
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@ -15,22 +15,21 @@ fn main() -> Result<()> {
fn extract_report_rates(report: &[String]) -> [i32; 2] {
let sums = compute_digits_sums(report);
let gamma_rate: String = sums
.iter()
.map(|&sum| if sum > 0 { "1" } else { "0" })
.collect::<Vec<&str>>()
.join("");
let epsilon_rate: String = sums
.iter()
.map(|&sum| if sum > 0 { "0" } else { "1" })
.collect::<Vec<&str>>()
.join("");
let gamma_rate: String = map_sums(&sums, |&sum| if sum > 0 { "1" } else { "0" }).join("");
let epsilon_rate: String = map_sums(&sums, |&sum| if sum > 0 { "0" } else { "1" }).join("");
[
binary_str_to_int(&gamma_rate),
binary_str_to_int(&epsilon_rate),
]
}
fn map_sums<T, F>(sums: &[i32], f: F) -> Vec<T>
where
F: FnMut(&i32) -> T,
{
sums.iter().map(f).collect::<Vec<T>>()
}
fn compute_digits_sums(report: &[String]) -> Vec<i32> {
report.iter().fold(vec![], |sums, curr| {
curr.chars()